Cansolv Technologies Inc' A Novel SO2 Scrubbing Process For Industrial SO2 Emission Control Alberta

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Cansolv Technologies Inc.A Novel SO2 Scrubbing
Process For Industrial SO2 Emission
ControlAlberta NOx and SOx Control Technologies
SymposiumApril 9, 2008Rick Birnbaumrick.birnba
um_at_cansolv.com
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OUTLINE

• CANSOLV Technologies Inc.
• SO2 Scrubbing Amine Chemistry
• SO2 Scrubbing Flow Sheet and Comparison to
  Conventional H2S Amines
• Applications for CANSOLV SO2 Scrubbing System in
  Various Industrial Applications
• Operating Units
• CANSOLV CO2 Capture System

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COMPANY HISTORY

• Cansolv SO2 Scrubbing System invented in 1988 at
  Union Carbide
• Key employee buyout of technology in 1997
• Technology Optimization
• 3 startups in 2002
• 1 startup in 2005
• 3 startups in 2006
• 1 startup in 2007
• 2 startups to come in 2008

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CANSOLV? SO2 SCRUBBING SYSTEM

• A regenerable SO2 absorption process
• Similar to H2S/CO2 amine treaters
• Uses conventional equipment
• Aqueous diamine solvent is highly selective for
  SO2

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CANSOLV? SO2 SCRUBBING SYSTEM

• Pure, water-saturated SO2 byproduct
• A very robust, easy to operate process
• Almost zero emissions at low cost
• Patented technology

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PROCESS CHEMISTRY

• Identical in concept to Amine/H2S chemistry
• Operates at pH range of 4.8 to 5.2 vs 9.7 to 11
• Aqueous diamine solvent solution
• Buffering provides high capacity for SO2
  absorption
• Proprietary solvent has the proper
  absorption/desorption strength
• Solvent amine is non-volatile since it is always
  in salt form
• Regeneration provides pure, water saturated SO2
  as byproduct

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AMINE ABSORBENT

• The unique diamine absorbent is the key to the
  CANSOLV SO2 Scrubbing System technology
• The first amine group is always in salt form
  providing absorbent non-volatility
• The second amine has the optimum strength for
  balanced absorption and regeneration

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CANSOLV SO2 Scrubbing System Flow Diagram
Prescrubber
Amine Purification/ Unit (APU)
Regen O/H System
Amine Absorber
Regenerator
To SO2 Conversion
To Stack

• Flue Gas
• Hot
• Atm Pr.
• May be dusty
• Contains H2O
• SO2 and SO3

• Clean Flue Gas
• 30 - 60 oC
• 200 mm H2O Pr
• lt 30 mg/Nm3 Dust
• Water saturated

APS
Sulfur Containing Fuel or Feed Stream
Combustion And Heat Recovery
Gas Cleaning And Cooling
Steam
Combustion System Boiler, Heater, Combuster,
Incinerator, Catalyst Regenerator
SO2 Management SO2 Capture SO2 Regeneration
Flue Gas Pretreatment Heat recovery - WHB Dust
removal - Open/Vent Prescrub SO3 removal -
SBS/WESP/Candles
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COMPARISON OF AMINES

• CANSOLV PROCESS
• Diamine salt absorbent
• Absorbent non-volatile
• 100 slip of CO2
• Stainless steel metallurgy
• Corrosion allowance minimal
• No Fe S formation
• Only source of solids is feed gas
• Filter lean amine stream

• CONVENTIONAL AMINE
• MEA, DEA, MDEA
• Amine volatile
• Difficulty in slipping CO2
• Carbon steel metallurgy
• Corrosion allowance important
• Fe S formation
• Fe S precipitation and scaling source of solids
• Filter lean amine stream

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COMPARISON OF AMINES

• CANSOLV PROCESS
• Rate of formation of HSS high due to oxidized gas
  feed
• Continuous reclaimer (ED)
• Amine stable to O2
• Amine degradation lower by factor of 2 to 3
• Operation and control similar
• Can achieve low (lt10 ppmv ) SO2. Not used for
  H2S..
• Foaming not an issue

• CONVENTIONAL AMINE
• Low rate of HSS formation
• Reclaiming not essential
• Amine not stable when exposed to O2
• Amine degradation important
• Operation and control similar
• Can achieve low ppmv H2S but CO2 can be a problem
• Foaming often a problem

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APPLICATIONS

• Power Boiler Emission Reduction
• Refinery FCCU Regen Gas
• Copper and Lead Smelting Off gas
• Claus SRU Tail Gas
• Sulfuric Acid Tail Gas
• Pulp and paper SO2 Capture

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CANSOLV SO2 SULFUR EMISSION MANAGEMENT
Benefits
Application Criteria
Fire high sulfur fuels Earn revenue from acid

• High sulfur fuel
• Poor access to limestone
• Access to H2SO4 market

• High sulfur cat feed
• Poor access to waste
• disposal sites

Incorporate SO2 into existing sulfur systems

• gt99.9 S capture required
• Increase capacity in SRU
• Treats other sulfur streams

Fewer exceedences Can use sour gas for TOX

• Treats to lt10 ppm SO2
• Poor access to byproduct
• markets

Can retrofit existing single absorption acid plant
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CANSOLV SO2 Power Boiler System Flow Diagram
Utility Boiler Economizer Air to Air Exchange
Prescrubber
Amine Absorber
Amine Purification/ Unit (APU)
Regen O/H System
ESP
Regenerator
To SO2 Conversion
To Stack
APS
Fuel
Air
Steam
Bottom Ash
Fly Ash
Wash H2O
Waste H2O
Combustion System Boiler Air to Air Exchange
SO2 Management SO2 Capture SO2 Regeneration
Flue Gas Pretreatment SO3 removal - SBS/WESP Dust
removal - Dry ESP Quench/Cool - Prescrub
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CANSOLV SO2 FCCU Regen DeSOx System Flow Diagram
Cat Regen CO Boiler Heat Recovery
Prescrubber
Amine Absorber
Amine Purification/ Unit (APU)
Regen O/H System
ESP
Regenerator
To SO2 Conversion
To Stack
CO Boiler
APS
Cat Regen
Steam
Air
Fly Ash
Wash H2O
Waste H2O
FCC Catalyst Regenerator
SO2 Management SO2 Capture SO2 Regeneration
Flue Gas Pretreatment SO3 removal - SBS/WESP Dust
removal - Dry ESP Quench/Cool - Prescrub
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2 Stage Claus with CANSOLV and Acid Gas Bypass

• Requires two stage thermal oxidizer for NH3
  destruction
• Increases SO2 Recycle to 10 of total Sulfur
• Reduces combustion air requirement by nearly
  33
• increases Claus Capacity by 15

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Impurities to Blowdown
Treated Gas to Stack
SO2 Product
Smelter/Sulfuric Acid Tail Gas
AMINE PURIFICATION UNIT
ABSORPTION COLUMN
LEGEND Gas Phase Liquid Phase Amine
REGENERATION COLUMN
Steam
M/U Water
Condensate
Lean Amine
Rich Amine
Acid Plant Tail Gas
Smelter Off Gas
98 H2SO4
DRYING TOWER
ACID PLANT
GAS CLEANING
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Commercial Units
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(No Transcript)
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Commercial Unit Operation Overview
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CANSOLV SRU Tail Gas Unit - Antwerp Belgium
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SO2 Capture and Transport - Quebec
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Spent Acid Regeneration Tail Gas Wilmington CA
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Lead Smelter Off-Gas PlantRajastan India
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Refinery USA FCC Regen Off-Gas Fluid Coker
Off-Gas
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SRU Tail Gas Scrubber, RefineryWashington
State, USA
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CHINA GRASS ROOTS COPPER ANODE FURNACE
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CANSOLV CO2 Scrubbing System
Statoil, Shell assemble carbon frontrunners
courtesy Statoil A mobile carbon-scrubbing
construction will be tested in May at the
Shell-Statoil carbon-dioxide project at Risavika,
just outside Stavanger, it was learned
Tuesday. Canadian supplier Cansolv is one of
three suppliers to the full-scale Halten CO2
project at Tjeldbergodden central Norway.
Mitsubishi Heavy Industries and Fluor are the
other carbon sequestration companies employed in
the tests. The companies are vying for a
contract to stop 2.5 million tonnes a year from
flowing into the atmosphere at a future 850
Megawatt gas-plant on the Tjeldbergodden
site. Cansolv is dwarfed by the two
industrial giants, but sits on solid knowledge
on the separating of carbon from natural gas,
although the plan is to separate 85 percent of
the C02 from the power plants exhaust passages.
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REGENERATION COLUMN
Treated Gas to Stack
Impurities to Blowdown
CO2 to Compression
AMINE PURIFICATION UNIT
ABSORPTION COLUMN
Lean Amine
Water Wash
CO2 Absorber
Rich P/A
Feed Gas Contact Cooler
Steam
Feed Gas from SO2 Absorber
Condensate
Rich Amine
LEGEND Gas Phase Liquid Phase
Amine
Purge Water
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Treated Gas to Stack
CO2 Product
CO2 Regenerator Column
Impurities to Blowdown
ABSORPTION COLUMN
CO2 AMINE PURIFICATION UNIT
Water Wash
Steam
Cond.
SO2 Product
In Line Quench
Impurities to Blowdown
Feed Gas
SO2 AMINE PURIFICATION UNIT
SO2 Regenerator Column
M/U Water
Steam
LEGEND Gas Phase Liquid Phase
SO2 Amine CO2 Amine
Rich Amine
Condensate
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QUESTIONS?